The game also offers you more fighter aircrafts. You can get gems by fighting, and use them to upgrade your fighters. You will be challenged different shapes and devastating barrages. It also makes the game more interesting, more colorful picture. Easy game operation will enable you to calmly face the challenges. Everything will show you a perfect combat world war. Features: * BOSS challenge system * Multiple battle maps * Different enemy models * Weapon upgrade system, props system * Exciting and astonishing sound effects and electronic rock soundtrack.